P0451
EVAP System Pressure Sensor/Switch A Circuit Range/Performance
P0451 is an OBD-II diagnostic trouble code meaning: EVAP System Pressure Sensor/Switch A Circuit Range/Performance. Common causes: evap system pressure sensor malfunction, open or short circuit in wiring harness. Estimated repair cost: $56–167.
Symptoms
- Check Engine Light Is On
- Increased fuel consumption
- Smell of gasoline in the cabin
Causes
- EVAP system pressure sensor malfunction
- Open or short circuit in wiring harness
- Problems with the engine control unit
- Clogged or damaged EVAP system lines
How to Fix
- Check the integrity of the sensor wiring harness
- Check the resistance and voltage of the pressure sensor
- Clean or replace pressure sensor
- Check the EVAP system for leaks
Related codes
Error P0451 by Vehicle Brand
FAQ
What does the P0451 code mean?
P0451 is an OBD-II diagnostic trouble code that indicates: EVAP System Pressure Sensor/Switch A Circuit Range/Performance
What causes a P0451 error code?
The most common causes of P0451 include: EVAP system pressure sensor malfunction; Open or short circuit in wiring harness; Problems with the engine control unit; Clogged or damaged EVAP system lines.
How do I fix a P0451 diagnostic trouble code?
To fix P0451: Check the integrity of the sensor wiring harness. Check the resistance and voltage of the pressure sensor. Clean or replace pressure sensor. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P0451?
Limited driving only, diagnose soon
How much does it cost to fix P0451?
The estimated repair cost for P0451 is $56–167. Actual cost depends on your vehicle, location, and labor rates.
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